The max size is less than 3" as far as I can figure,, not much info out there on these things,,,, I think mine is fullly grown at just over 2.5"
They are reef-safe. They are carnivores,,, mine will eat almost any kind of Marine flesh. I feed it once every 4 or 5 days by putting a thawed shrimp/clam/squid/whatever in a plastic clip on the glass and it rips it to shreds,,, takes a couple of days for it to eat a 3 inch shrimp.
He was briefly in my 75 reef with all manner of snails, starfish, cukes, cleaner shrimps, etc etc and I only ever saw him eat pods off the glass. Mind you,,, I dunno what would happen if I forgot to feed him for a couple of weeks.
I was worried about putting it in a tank with smaller fishes,, I'm pretty sure this thing could bite a clown goby clean in half. I've only witnessed one incident in the 12g, when a perc tried to take some shrimp from the clip,,, the skilletfish grabbed the perc and chomped on him a bit,,, but the perc was fine and doesn't care for shrimp anymore.
They are also the easiest fish in the world to catch,,,,, just put some food in the clip and it will not leave it,,, even when you put the net over him he doesn't make a run for it.
Skilletfish have been bred in captivity but I don't think they will ever be commercially bred for the hobby,,, they're not much to look at, and they pretty much just stick on the glass until you feed them,, but I like 'em.
